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In the linear equation y = a + bx, the letter b represents the:
AThe slope
BY-intercept
CX-intercept
DA residual
Answer & Solution
Correct answer: A. The slope
1. A straight line is fixed by where it starts and how steeply it rises.
2. For the linear equation y = a + bx, b is the slope and a is the y-intercept.
3. The slope reports the change in y for a one-unit change in x.
4. The intercept is the value of y when x is zero.
_Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 12 'Linear Regression and Correlation', sections 12.1-12.6_
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